Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Model | 140CRA93200 |
| Product Type | Modicon Quantum RIO drop adapter module |
| Network Protocol | S908 RIO over 75 Ω coaxial cable |
| Connectors | 2 F-type coaxial connectors, redundant cable support |
| Transmission Rate | 1.544 Mbit/s |
| Dynamic Range | 35 dB |
| Isolation Voltage | 500 V DC, coaxial center to ground |
| I/O Capacity | 64 input words / 64 output words per drop |
| Max I/O Modules per Drop | Up to 27 Quantum I/O modules |
| Backplane Bus Current | 750 mA |
| Power Consumption | 3.8 W max, typical 3 W |
| Compatible Platforms | Modicon Quantum 200/500/800 series and SY/MAX combinations |
| Operating Temperature | 0 to 60 °C |
| Product Status | Legacy / obsolete spare |
Product Introduction
On legacy Modicon Quantum systems, remote I/O racks do not talk directly to the CPU over Ethernet. They ride the S908 RIO coaxial network, and the 140CRA93200 is the module that makes a remote rack visible to the head-end adapter. It sits in a local Quantum rack, connects to the dual coaxial RIO cable, and presents up to 64 input words and 64 output words to the controller.
This module is especially common in older water, power, chemical, and manufacturing installations where Quantum RIO racks are distributed across a plant. Because it uses redundant coaxial cabling, a single cable break does not necessarily collapse the entire drop. Replacement is usually straightforward if the RIO address, drop position, and I/O map are preserved.
QA/QC Transparency SOP
- Intake & Origin Verification — Confirm model 140CRA93200, serial number, hardware revision, and country of origin. Inspect F-type coaxial connectors, backplane pins, and LED indicators.
- Visual & Mechanical Inspection — Check for damaged coaxial ports, bent connector pins, corrosion, cracked housing, or signs of backplane arcing.
- RIO Functional Test — Install into a compatible Quantum test rack with a CRP head-end adapter. Verify power-up, LED status, and RIO communication handshake.
- I/O Mapping Verification — Confirm that the drop exchanges 64 input words and 64 output words correctly with the head-end adapter. Validate redundancy behavior by simulating a single-cable fault.
- Final QC & Anti-Static Packaging — Seal in ESD-safe packaging with test results, nameplate photos, revision data, and RIO configuration notes.
Field Engineer Gotchas
- CRA is not CRP. 140CRA93200 is a RIO drop adapter. 140CRP93200 is the RIO head-end/processor-side adapter. They are not interchangeable.
- Do not confuse it with Ethernet modules. The 140CRA93200 uses 75 Ω coaxial S908 RIO, not Ethernet/IP or Modbus TCP. Listings describing RJ45 Ethernet ports for this model are inconsistent with official Schneider documentation.
- Dual coax does not mean dual network. The two F-type connectors support redundant coaxial cabling on the same RIO segment. Incorrect termination or tap wiring can still cause communication loss.
- Drop address must match configuration. If the RIO network map expects a different drop position or I/O word count, the module may show fault LEDs even when hardware is healthy.
- Bus current matters. The 140CRA93200 draws 750 mA from the Quantum backplane. Ensure the rack power budget can support it plus all local I/O modules.
- Firmware updates require ExecLoader. When updating firmware, the slot number must reference the CRA module slot, not the CPU slot.
Schneider 140CRA93200
Application Scenarios
- Distributed process control racks. Extends Quantum I/O to remote coaxial drops in water, chemical, and power applications.
- Legacy manufacturing lines. Maintains existing S908 RIO architecture where replacing the entire I/O network is not feasible.
- Redundant coaxial RIO segments. Helps preserve communication when one coaxial path is damaged, provided the network is correctly terminated.
- Brownfield spare replacement. Restores a failed remote drop without reengineering the RIO map or CPU program.
FAQ
What does 140CRA93200 do?
It acts as a remote I/O drop adapter on the Modicon Quantum S908 RIO coaxial network, allowing a local rack to exchange I/O data with the head-end adapter.
Is it the same as 140CRP93200?
No. 140CRA93200 is a RIO drop adapter. 140CRP93200 is the RIO head-end/processor-side adapter.
Does it support Ethernet?
No. It uses 75 Ω coaxial S908 RIO communication. Any description listing RJ45 Ethernet ports for 140CRA93200 should be treated as unreliable.
How many I/O modules can it support?
Up to 27 Quantum I/O expansion modules per drop, with 64 input words and 64 output words.
What is the transmission rate?
1.544 Mbit/s over redundant 75 Ω coaxial cable.
How do I confirm compatibility?
Provide photos of the module nameplate, installed Quantum rack, coaxial connectors, and the current RIO network configuration. The drop address and I/O map are critical.
